Describe the feature and motivation

Hello, The original issue is #23466 (comment).

Related #23791 (I'm sorry if this is duplicated.)

What is problem

When using external(not built-in) protobuf v22 and later, building dnn module is failed.

Reason

Because protobuf v22 has a few breaking changes. ( https://protobuf.dev/support/migration/#cpp-22 )

• it drops supporting C++11.
• it depends abseil-cpp
  • And std::string_view in abseil-cpp seems to request C++17 and later.

How to fix it ?

I believe.

• keeping internal protobuf (v19) is better to support C++11.
  • Updating to v21 is better, but evenif updated, we can use it only until 2024/Q1 with supporting. ( https://protobuf.dev/support/version-support/ )
  • After 2024/Q2, we must be update internal protobuf(e.g. v24 LTS) with abseil-cpp.
    • The abseil configuration maybe relax C++11 supporting (https://github.com/abseil/abseil-cpp/blob/master/absl/base/options.h).
• supporintg external protobuf needs some limitation to avoid some compile error.
  • If using v22 and later, abseil-cpp and C++17 are required.

Additional context

No response